unlink unix domain socket file after testing

src/core/ngx_connection.c

@@ -365,6 +365,18 @@ ngx_open_listening_sockets(ngx_cycle_t *cycle)
                 continue;
             }
 
+#if (NGX_HAVE_UNIX_DOMAIN)
+
+            if (ngx_test_config && ls[i].sockaddr->sa_family == AF_UNIX) {
+                u_char *name = ls[i].addr_text.data + sizeof("unix:") - 1;
+
+                if (ngx_delete_file(name) == -1) {
+                    ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
+                                  ngx_delete_file_n " %s failed", name);
+                }
+            }
+#endif
+
             if (listen(s, ls[i].backlog) == -1) {
                 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
                               "listen() to %V, backlog %d failed",